CCR Router Firewall default rules -???

How to fortify my CCR 2004 -16g - 2s+ router. Recently password hacked and the router was compromised.

Reset the router configuration with fresh install.

What are the default Minimum firewall rules.

Can I have from AI?

Start from the (unofficial) Rules of the Mikrotik Club:

Rule #8 Is about the default firewall, in its corollary there is a link to an updated set of default firewall rules.

Yes, you can. Why not? But remeber to ask that AI for help when you would have problems.

Just a rethorical question: do you blindly believe to AI answers?